CVE-2026-18677: CWE-290 Authentication Bypass by Spoofing in Kong Inc. Kong Mesh
In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.
CVE-2026-18677: CWE-290 Authentication Bypass by Spoofing in Kong Inc. Kong Mesh
Description
In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.
CVSS v4.0
Score 6.0medium
Affected software
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Kong
- Date Reserved
- 2026-08-03T15:20:45.630Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7cc1f3bf8831d539fe73f6
Added to database: 08/12/2026, 18:56:51 UTC
Last updated: 08/12/2026, 18:56:51 UTC
Views: 1
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